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 qdiv(3) -- return quotient and remainder from division
    The qdiv() function computes the value num/denom and returns the quotient and remainder in a structure named qdiv_t that contains two quad integer members named quot and rem.
 qiflush(3) -- curses input options
    Normally, the tty driver buffers typed characters until a newline or carriage return is typed. The cbreak routine disables line buffering and erase/kill character-processing (interrupt and flow contro...
 qsort(3) -- sort functions
    The qsort() function is a modified partition-exchange sort, or quicksort. The heapsort() function is a modified selection sort. The mergesort() function is a modified merge sort with exponential searc...
 queue(3) -- lists, doubly-linked lists, simple queues, tail queues, and circular queues
    These macros define and operate on five types of data structures: singlylinked lists, simple queues, lists, tail queues, and circular queues. All five structures support the following functionality: 1...
 radixsort(3) -- radix sort
    The radixsort() and sradixsort() functions are implementations of radix sort. These functions sort an array of nmemb pointers to byte strings. The initial member is referenced by base. The byte string...
 raise(3) -- send a signal to the current process
    The raise() function sends the signal sig to the current process.
 rand(3) -- bad random number generator
    These interfaces are obsoleted by random(3). The rand() function computes a sequence of pseudo-random integers in the range of 0 to RAND_MAX (as defined by the header file ). The srand() fun...
 rand48(3) -- pseudo-random number generators and initialization routines
    The rand48() family of functions generates pseudo-random numbers using a linear congruential algorithm working on integers 48 bits in size. The particular formula employed is r(n+1) = (a * r(n) + c) m...
 random(3) -- better random number generator; routines for changing generators
    The random() function uses a non-linear additive feedback random number generator employing a default table of size 31 long integers to return successive pseudo-random numbers in the range from 0 to (...
 RAND_add(3) -- add entropy to the PRNG
    RAND_add() mixes the num bytes at buf into the PRNG state. Thus, if the data at buf are unpredictable to an adversary, this increases the uncertainty about the state and makes the PRNG output less pre...
 RAND_bytes(3) -- generate random data
    RAND_bytes() puts num cryptographically strong pseudo-random bytes into buf. An error occurs if the PRNG has not been seeded with enough randomness to ensure an unpredictable byte sequence. RAND_pseud...
 RAND_cleanup(3) -- erase the PRNG state
    RAND_cleanup() erases the memory used by the PRNG.
 RAND_egd(3) -- query entropy gathering daemon
    RAND_egd() queries the entropy gathering daemon EGD on socket path. It queries 255 bytes and uses RAND_add(3) to seed the OpenSSL built-in PRNG. RAND_egd(path) is a wrapper for RAND_egd_bytes(path, 25...
 RAND_egd_bytes(3) -- query entropy gathering daemon
    RAND_egd() queries the entropy gathering daemon EGD on socket path. It queries 255 bytes and uses RAND_add(3) to seed the OpenSSL built-in PRNG. RAND_egd(path) is a wrapper for RAND_egd_bytes(path, 25...
 RAND_event(3) -- add entropy to the PRNG
    RAND_add() mixes the num bytes at buf into the PRNG state. Thus, if the data at buf are unpredictable to an adversary, this increases the uncertainty about the state and makes the PRNG output less pre...
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